Elecraft KX3-4M - Manual (Page 2)

2
Introduction
The KX3-2M or 4M transverter extends the frequency range of the KX3 to include the 2 meter or 4 meter
Amateur bands and allows reception on frequencies near those bands. Either the 2-meter or the 4-meter
transverter may be installed. The transverter plugs into existing connectors inside the KX3. All KX3
functions and modes are available when using either transverter. The KX3-2M or KX3-4M transverter uses
a separate antenna connector that bypasses the KXAT3.
CAUTION
The KX3-2M or KX3-4M module and many components inside your KX3 may
be damaged by Electrostatic Discharge (ESD) simply by touching them or a
circuit board containing them unless you take specific steps to prevent such
damage. If you are installing the KX3-2M or KX3-4M module yourself, see
Preventing Electrostatic Discharge Damage on page 12 before opening the
package containing the KX3-2M or KX3-4M module or working inside your
KX3.
Specifications
General
Transmit Frequency Range: KX3-2M: 144 MHz – 148 MHz
KX3-4M: 69.9 MHz – 70.6 MHz (covers all known 4-meter
frequency allocations)
Receive Frequency Range: KX3-2M: 120 MHz – 150 MHz, typical, with reduced
sensitivity outside of 144-148 MHz
KX3-4M: 65 MHz – 72 MHz, typical, with reduced sensitivity
outside of 69.9-71 MHz.
Power Consumption:
120 mA receive, squelch open, typical, in addition to the
normal KX3 current demand whenever the 2 meter or 4 meter
band is selected.
Sleep Mode (see page 10) can reduce the overall radio
current to about 150-180 mA in FM Mode (squelched).
1.7 A at 3W output, total radio current, typical for the KX3
when transmitting on 2M or 4M.
Receiver, 2M and 4M
Sensitivity: MDS -144 dBm, typical, at 500 Hz bandwidth.
Transmitter, 2M and 4M
Output Power: 2.5 W Minimum with 13.8 Vdc supply (2.5 to 3 watts typical)
2 W Maximum with 11 Vdc supply
1.5 W Maximum with 9 Vdc supply